include/llvm-c/Target.h

   1 /*===-- llvm-c/Target.h - Target Lib C Iface --------------------*- C++ -*-===*\
   2 |*                                                                            *|
   3 |*                     The LLVM Compiler Infrastructure                       *|
   4 |*                                                                            *|
   5 |* This file is distributed under the University of Illinois Open Source      *|
   6 |* License. See LICENSE.TXT for details.                                      *|
   7 |*                                                                            *|
   8 |*===----------------------------------------------------------------------===*|
   9 |*                                                                            *|
  10 |* This header declares the C interface to libLLVMTarget.a, which             *|
  11 |* implements target information.                                             *|
  12 |*                                                                            *|
  13 |* Many exotic languages can interoperate with C code but have a harder time  *|
  14 |* with C++ due to name mangling. So in addition to C, this interface enables *|
  15 |* tools written in such languages.                                           *|
  16 |*                                                                            *|
  17 \*===----------------------------------------------------------------------===*/
  18
  19 #ifndef LLVM_C_TARGET_H
  20 #define LLVM_C_TARGET_H
  21
  22 #include "llvm-c/Core.h"
  23
  24 #ifdef __cplusplus
  25 extern "C" {
  26 #endif
  27
  28 enum { LLVMBigEndian, LLVMLittleEndian };
  29 typedef int LLVMByteOrdering;
  30
  31 typedef struct LLVMOpaqueTargetData *LLVMTargetDataRef;
  32 typedef struct LLVMStructLayout *LLVMStructLayoutRef;
  33
  34
  35 /*===-- Target Data -------------------------------------------------------===*/
  36
  37 /** Creates target data from a target layout string.
  38     See the constructor llvm::TargetData::TargetData. */
  39 LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep);
  40
  41 /** Adds target data information to a pass manager. This does not take ownership
  42     of the target data.
  43     See the method llvm::PassManagerBase::add. */
  44 void LLVMAddTargetData(LLVMTargetDataRef, LLVMPassManagerRef);
  45
  46 /** Converts target data to a target layout string. The string must be disposed
  47     with LLVMDisposeMessage.
  48     See the constructor llvm::TargetData::TargetData. */
  49 char *LLVMCopyStringRepOfTargetData(LLVMTargetDataRef);
  50
  51 /** Returns the byte order of a target, either LLVMBigEndian or
  52     LLVMLittleEndian.
  53     See the method llvm::TargetData::isLittleEndian. */
  54 LLVMByteOrdering LLVMByteOrder(LLVMTargetDataRef);
  55
  56 /** Returns the pointer size in bytes for a target.
  57     See the method llvm::TargetData::getPointerSize. */
  58 unsigned LLVMPointerSize(LLVMTargetDataRef);
  59
  60 /** Returns the integer type that is the same size as a pointer on a target.
  61     See the method llvm::TargetData::getIntPtrType. */
  62 LLVMTypeRef LLVMIntPtrType(LLVMTargetDataRef);
  63
  64 /** Computes the size of a type in bytes for a target.
  65     See the method llvm::TargetData::getTypeSizeInBits. */
  66 unsigned long long LLVMSizeOfTypeInBits(LLVMTargetDataRef, LLVMTypeRef);
  67
  68 /** Computes the storage size of a type in bytes for a target.
  69     See the method llvm::TargetData::getTypeStoreSize. */
  70 unsigned long long LLVMStoreSizeOfType(LLVMTargetDataRef, LLVMTypeRef);
  71
  72 /** Computes the ABI size of a type in bytes for a target.
  73     See the method llvm::TargetData::getTypePaddedSize. */
  74 unsigned long long LLVMABISizeOfType(LLVMTargetDataRef, LLVMTypeRef);
  75
  76 /** Computes the ABI alignment of a type in bytes for a target.
  77     See the method llvm::TargetData::getTypeABISize. */
  78 unsigned LLVMABIAlignmentOfType(LLVMTargetDataRef, LLVMTypeRef);
  79
  80 /** Computes the call frame alignment of a type in bytes for a target.
  81     See the method llvm::TargetData::getTypeABISize. */
  82 unsigned LLVMCallFrameAlignmentOfType(LLVMTargetDataRef, LLVMTypeRef);
  83
  84 /** Computes the preferred alignment of a type in bytes for a target.
  85     See the method llvm::TargetData::getTypeABISize. */
  86 unsigned LLVMPreferredAlignmentOfType(LLVMTargetDataRef, LLVMTypeRef);
  87
  88 /** Computes the preferred alignment of a global variable in bytes for a target.
  89     See the method llvm::TargetData::getPreferredAlignment. */
  90 unsigned LLVMPreferredAlignmentOfGlobal(LLVMTargetDataRef,
  91                                         LLVMValueRef GlobalVar);
  92
  93 /** Computes the structure element that contains the byte offset for a target.
  94     See the method llvm::StructLayout::getElementContainingOffset. */
  95 unsigned LLVMElementAtOffset(LLVMTargetDataRef, LLVMTypeRef StructTy,
  96                              unsigned long long Offset);
  97
  98 /** Computes the byte offset of the indexed struct element for a target.
  99     See the method llvm::StructLayout::getElementContainingOffset. */
 100 unsigned long long LLVMOffsetOfElement(LLVMTargetDataRef, LLVMTypeRef StructTy,
 101                                        unsigned Element);
 102
 103 /** Struct layouts are speculatively cached. If a TargetDataRef is alive when
 104     types are being refined and removed, this method must be called whenever a
 105     struct type is removed to avoid a dangling pointer in this cache.
 106     See the method llvm::TargetData::InvalidateStructLayoutInfo. */
 107 void LLVMInvalidateStructLayout(LLVMTargetDataRef, LLVMTypeRef StructTy);
 108
 109 /** Deallocates a TargetData.
 110     See the destructor llvm::TargetData::~TargetData. */
 111 void LLVMDisposeTargetData(LLVMTargetDataRef);
 112
 113
 114 #ifdef __cplusplus
 115 }
 116
 117 namespace llvm {
 118   class TargetData;
 119
 120   inline TargetData *unwrap(LLVMTargetDataRef P) {
 121     return reinterpret_cast<TargetData*>(P);
 122   }
 123
 124   inline LLVMTargetDataRef wrap(const TargetData *P) {
 125     return reinterpret_cast<LLVMTargetDataRef>(const_cast<TargetData*>(P));
 126   }
 127 }
 128
 129 #endif /* defined(__cplusplus) */
 130
 131 #endif